Lock-nut.



HERBERT F. FOVJLER, 0F OMAHA, NEBRASKA, ASSGNGR 0F @NE-HALF T ."EVARE BIGNELL, OF LNCOLN, NEBRASKA, ANI) ONE-FURTH T0 LE ROY Il'. WLE., QF

OMAHA., NEBRSK.

LOCK-NUT.

Specification of Letters Patent.

atenteol Apr., Qt, a.

Application filed April 2, 191'?, Serial No. 159,157. Renewed February 2, 1918:.' Serial Eto. 215,225.

T 0 all when@ t may concern:

Be it known that I, Hemmer F. FowLaR, a citizen of the United States, residing at Omaha, in the county of Douglas and State of Nebraska, have invented certain new and useful improvements in Lock-Nuts, of which the following is a specification.

This invention relates to an im provement in nut-locks oil the class used in connection with threaded bolts to prevent loosening ot the seating ofthe nut on the bolt from vibration, and has for its object to provide two nuts so constructed that they will both operate in an equal degree in sustaining stresses directed longitudinally of the bolt, and also will cooperate to prevent any reverse rotation thereof, 01. the bolt, from vibration.

The invention includes a bolt-nut provided with a recess opening on its inner, circular, threaded wall, the wall of said recess being non-concentric with the threaded wall, said nut to be used in connection with a second bolt-nut having a segmental projection at one of its ends provided with threads on its concaved side adapted to mesh with the threads of the bolt., the convexed wall of said projection being nonconcentric with its threaded wall, the thickness of the first named nut being equal to the lengthV of the projection, so. that when the parts are assembled, the rst named nut will he disposed flush with the end of the projection. Other features considered of advantage and outlining the scope of the invention will be mentioned hereinafter.

l'n the drawing, Figure 1 is a side view of parts showing the nuts applied to a bolt.

Fig. 2 is an end view of the two nuts when a threaded projection. Fig. 7 is a side viewor the same. Fig. 8 is a view in longitudinal section of the nut shown in Figs. 6 and 7.

The invention is illustrated in' connection with a threaded bolt 9 which traverses aipair of plates or strips 10 and 10, a bolt-nut 11 and a second bolt-nut 12, for pressing the strips or plates toward each. other.

The nut 11 is provided with a recessv 13 which opens on its ends and also opens on a part of its aperture or circular, threaded wall a, said recess being of segmental form and having a smooth, concave wall b which. is non-concentric with the wall a.

The second nnt 12 is provided at one of its ends with a projection 14. of segmental form in plan, said proj eetion being provided with an inner threaded lwall c concentric with and disposed in the'plane of the circular, threaded wall d of said nut 12, said projection having an outer, smooth, conveXed. wall e which is non-concentric with the walls o and d.

In operation, to cause a pressure against each other oit an two arts or ob'ects asv y P i a the projection 14 will be compressed within the convergent end of the recess 13 of the nut 11, and it will be appreciated that any reverse, rotatable movement of the nut 11, thereafter, will be resisted and prevented for the reason that any tendency for such a movement would only result in an increased compression of the projection in the recess, and therefore jolts or vibrations will not cause any rotation of either of the nuts since the eccentric mounting for the projection causes the threads c ot the projection and the threads a of the nut 11 to be pressed against opposed sides of the bolt with such force that any rotatable movement is prevented.

1n instances where bolts are used upon metallic bridges or the track-rails of railways, the metallic parts become worn away by action of rust, which results in a loose fitting of the bolts, and therefore occasional adjustments are required, and when bolts are used upon wooden structures, .adjustments are required on account of shrinkage ofthe wood. The herein described nutlock is of great advantage for use upon all metallic and wood structures for the reason that the bolts and nuts may be repeatediy used, Without injury.

The important feature disclosed by the invention is the provision of threads a for the nut ll, this being entirely new in the art. On account of this feature the threads 'of the bolt do not become injured b y action of said bolt 11, the operation being that when the nut 11 is rotated for its locked relation, the'threads a are pressed against the threads of the bolt with such force that any reverse rotation of the nut 1l for loosening it, will be prevented. it Will be noted that the threads of the nut 11 and the threads of the bolt 9 are not disposed translverse with respect to each other, and that the 30 that since the nut 11 has a length or thick"- ness corresponding to the length of the pro- .jection 14 of the inner nut 12, the outer face of said nut 11 will be disposed flush with the end of the projection.

When it is desired to remove the nuts from the bolt, the inner nut 12 is rotated in a manner to cause its compression' against the object 10 to be slightly increased, which causes its projection to occupy a somewhat larger part of the segmental recess 13 of nut 11, and the nuts may then be readily rethe threads secarse moved from the bolt by rotating them in a reverse direction than iirst mentioned.

Having fully described my invention what i claim and desire to secure by Letters Patent is,-

l; in a 1ock-nut for threaded bolts, an interiorly threaded nut provided at one of its ends With a segmental projection, a second nut having a threaded aperture and provided with a recess opening on said aperture for receiving the projection of the iirst named nut, the outer Wall of the recess of the second nut being non-concentric with the threaded Wall of its aperture and the outer wall of the projection being non-concentric with the Wall of its threaded aperture to cause the threaded wall of the second nut to be pressed against the threads of the bolt to prevent a revoluble movement of the second nut in one direction when the second nut has been rotated for a movement into engagement with the first named nut.

2.. In combination with a threaded bolt, a nut provided witha segmental lug having an eccentric outer Wall,'a second nut having a recess opening on the threaded wall oi its aperture for receiving the lug of the first named nut when said nuts are disposed end to end on said bolt, said recess being of segmental form and having an eccentric outer wall adapted to be engaged by the lug for pressing the threaded Wall of said second nut against the threads of the bolt when.

said second nut is rotated in one irection. In testimony whereof, I have aiiixed my signature in pesence of two witnesses.

ERBEET l?, FOVVLER.

Witnesses:

HIRAM A. SrURGns, ARTHUR H. STURGES.

@epilee e? @atene may ne obtained @er ive cents each, by addressing the tomaiiseiener et Entente,

Washington, D. C. 

